[Elecraft] KPA1500 Drive Power

[Paul Baldock]

Can you safely increase the drive to get it back to 1500W?

Another question: Is the drive requirement (amp 
gain) pretty flat from band to band?

- Paul  KW7Y

At 08:10 AM 5/31/2018, Bill Stravinsky via Elecraft wrote:
>  Yup, as the temp climbs the output drops 
> some.  Even though I'm glad I got the solid 
> state amp I still prefer tubes, hi.  The drop 
> is anywhere between 100 to maybe 300 watts.I 
> never really noted the exact numbers. BillK3WJV 
> p.s. I'm thinking its a normal solid state 
> thing.     On Wednesday, May 30, 2018, 4:23:47 
> PM EDT, K9MA <k9ma at sdellington.us> wrote:  I'm 
> using the K3 with the Elecraft interface 
> cable.  I've noticed the the CW drive power 
> required by mine varies considerably, both with 
> temperature and SWR.  If I set the K3 output 
> for a KPA1500 output of 1500 W output 
> initially, the output will drop to perhaps 1100 
> W when the temperature stabilizes at around 65 
> C.  (I've ruled out any change in antenna 
> impedance, etc.)Â  A similar change occurs if 
> the SWR goes from 1:1 to 1.2:1 when changing 
> frequency or switching antennas.  I haven't 
> changed the ALC from the default setting.  Has 
> anyone else noticed this? 73, Scott K9MA -- 
> Scott  K9MA k9ma at sdellington.us 
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